refactor(tracing): drop redundant inline comment in init_tracing

Author: fengmk2

crates/vite_shared/src/tracing.rs

@@ -24,8 +24,6 @@ pub fn init_tracing() {
     static TRACING: OnceLock<()> = OnceLock::new();
     TRACING.get_or_init(|| {
         let Ok(env_var) = std::env::var(env_vars::VITE_LOG) else {
-            // No VITE_LOG set — skip subscriber installation so the global
-            // default slot stays available for other components.
             return;
         };